激光选区熔化高强铝合金件的热处理及空间环境性能  

Heat treatment and space environment performance of high strength aluminum alloy parts by selective laser melting

作　　者：姜超 贾东永 周志勇[1] 田政 郭星晔 王哲 韩修柱[1] Jiang Chao;Jia Dongyong;Zhou Zhiyong;Tian Zheng;Guo Xingye;Wang Zhe;Han Xiuzhu(Beijing Institute of Spacecraft System Engineering,Beijing 100094,China;Faculty of Materials and Manufacturing,Beijing Polytechnic University,Beijing 100124,China;Beijing Satellite Manufacturing Co.,Ltd.,Beijing 100094,China)

机构地区：[1]北京空间飞行器总体设计部,北京100094 [2]北京工业大学材料与制造学部,北京100124 [3]北京卫星制造厂有限公司,北京100094

出　　处：《金属热处理》2022年第7期1-8,共8页Heat Treatment of Metals

基　　金：国家重点研发计划(2018YFB1106303)。

摘　　要：采用激光选区熔化(SLM)增材制造技术制备了铝镁钪锆体系的高强铝合金试样,并对该试样进行退火和固溶时效处理,研究其组织和力学性能的演变。对试样进行高低温循环试验,以模拟空间环境温度变化,进而研究经过高低温循环后的力学性能演变。结果表明,对于该SLM制备的高强铝合金而言,退火处理可以显著改善其力学性能。经过模拟空间环境的高低温循环试验后,试样力学性能保持不变,能够满足空间交变温度下的性能要求。High-strength aluminum alloy specimens of aluminum-magnesium-scandium-zirconium system were prepared by adopting the additive manufacturing technologys of selective laser melting(SLM). The evolution of the microstructure and mechanical properties of the specimens during annealing and solution aging treatment were studied. In addition, high and low temperature cycle experiments were carried out on the specimens to simulate the temperature change of the space environment, and then the evolution of mechanical properties after high and low temperature cycles were studied. The results show that for the high-strength aluminum alloy prepared by the SLM, the annealing treatment can significantly improve its mechanical properties. After the high and low temperature cycle experiment simulating the space environment, mechanical properties of the specimens remain unchanged, so it meets the performance requirements under the space alternating temperature.

关 键 词：高强铝合金 激光选区熔化 热处理 空间环境 力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG665[金属学及工艺—金属材料]